Jose's school spent $1284 on 9 sticksof memory and a new hard drive. the hard drive cost $168. which is the reasonable estimate of the cost of one stick of memory?

Can someone me out here and the tell me the greatest common factor

With alll of except for the 2 that i did already

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?